Monsters of North America: The Slide Rock Bolter of Colorado!

This huge creature lurks at the tops of mountains,lying in wait, unmoving. It latches itself to the rocks using hooks or fingers on its tail. It seems to be a giant whale.
When it spots prey—usually climbers and tourists—it releases its hooks and slides down the slope, tearing through trees and boulders, and snaps up the victim whole.

The Slide Rock Bolter has been blamed for many missing Colorado tourists.